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Home Q & A Board Science-Related Homework Help Mathematics Statistics and Probability
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jccruz jccruz
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A year ago
Psychologists wish to evaluate the consistency of a standardized behavioral test. The test is designed to have a variance of 225. Twenty randomly sampled tests yield a variance of 240. Assuming the underlying population is normal, what is a 90% confidence interval for the variance of this test?


▸

(151.276, 450.727)



▸

(12.300, 21.230)



▸

(190.542, 328.899)



▸

(138.803, 511.986)

Textbook 
Introductory Statistics: A Problem-Solving Approach

Introductory Statistics: A Problem-Solving Approach


Edition: 3rd
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kniemeier2kniemeier2
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A year ago
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jccruz Author
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A year ago
Thanks for your help!!
halyna
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Yesterday
I appreciate what you did here, answered it right Smiling Face with Open Mouth
patod1
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2 hours ago
Correct Slight Smile TY
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